/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.instruction;

/**
 * This Instruction represents a simple instruction without variable arguments or constant pool references.
 *
 * @author Eric Lafortune
 */
public abstract class SwitchInstruction extends Instruction {
    public int defaultOffset;
    public int[] jumpOffsets;

    /**
     * Creates an uninitialized SwitchInstruction.
     */
    public SwitchInstruction() {}

    /**
     * Creates a new SwitchInstruction with the given arguments.
     */
    public SwitchInstruction(byte opcode, int defaultOffset, int[] jumpOffsets) {
        this.opcode = opcode;
        this.defaultOffset = defaultOffset;
        this.jumpOffsets = jumpOffsets;
    }

    /**
     * Copies the given instruction into this instruction.
     * 
     * @param switchInstruction the instruction to be copied.
     * @return this instruction.
     */
    public SwitchInstruction copy(SwitchInstruction switchInstruction) {
        this.opcode = switchInstruction.opcode;
        this.defaultOffset = switchInstruction.defaultOffset;
        this.jumpOffsets = switchInstruction.jumpOffsets;

        return this;
    }

    // Implementations for Instruction.

    public String toString(int offset) {
        return "[" + offset + "] " + toString() + " (target=" + (offset + defaultOffset) + ")";
    }

    // Implementations for Object.

    public String toString() {
        return getName() + " (" + jumpOffsets.length + " offsets, default=" + defaultOffset + ")";
    }
}
